Melatonin is a hormone primarily released by the pineal gland at night, and has long been associated with control of the sleep–wake cycle. As a dietary supplement, it is often used for the short-term treatment of insomnia, such as from jet lag or shift work, and is typically taken orally.
This NFT description uses material from the Wikipedia article [Melatonin](https://en.wikipedia.org/wiki/Melatonin) which is released under the [CC-BY-SA](https://creativecommons.org/licenses/by-sa/3.0/)